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        <title>PHPExcel Reader Example #11</title>

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        <h1>PHPExcel Reader Example #11</h1>
        <h2>Reading a Workbook in "Chunks" Using a Configurable Read Filter (Version 1)</h2>
        <?php
        /** Include path * */
        set_include_path(get_include_path() . PATH_SEPARATOR . '../../../Classes/');

        /** PHPExcel_IOFactory */
        include 'PHPExcel/IOFactory.php';


        $inputFileType = 'Excel5';
//	$inputFileType = 'Excel2007';
//	$inputFileType = 'Excel2003XML';
//	$inputFileType = 'OOCalc';
//	$inputFileType = 'Gnumeric';
        $inputFileName = './sampleData/example2.xls';

        /**  Define a Read Filter class implementing PHPExcel_Reader_IReadFilter  */
        class chunkReadFilter implements PHPExcel_Reader_IReadFilter {

            private $_startRow = 0;
            private $_endRow = 0;

            /**  We expect a list of the rows that we want to read to be passed into the constructor  */
            public function __construct($startRow, $chunkSize) {
                $this->_startRow = $startRow;
                $this->_endRow = $startRow + $chunkSize;
            }

            public function readCell($column, $row, $worksheetName = '') {
                //  Only read the heading row, and the rows that were configured in the constructor
                if (($row == 1) || ($row >= $this->_startRow && $row < $this->_endRow)) {
                    return true;
                }
                return false;
            }

        }

        echo 'Loading file ', pathinfo($inputFileName, PATHINFO_BASENAME), ' using IOFactory with a defined reader type of ', $inputFileType, '<br />';
        /**  Create a new Reader of the type defined in $inputFileType  * */
        $objReader = PHPExcel_IOFactory::createReader($inputFileType);


        echo '<hr />';


        /**  Define how many rows we want for each "chunk"  * */
        $chunkSize = 20;

        /**  Loop to read our worksheet in "chunk size" blocks  * */
        for ($startRow = 2; $startRow <= 240; $startRow += $chunkSize) {
            echo 'Loading WorkSheet using configurable filter for headings row 1 and for rows ', $startRow, ' to ', ($startRow + $chunkSize - 1), '<br />';
            /**  Create a new Instance of our Read Filter, passing in the limits on which rows we want to read  * */
            $chunkFilter = new chunkReadFilter($startRow, $chunkSize);
            /**  Tell the Reader that we want to use the new Read Filter that we've just Instantiated  * */
            $objReader->setReadFilter($chunkFilter);
            /**  Load only the rows that match our filter from $inputFileName to a PHPExcel Object  * */
            $objPHPExcel = $objReader->load($inputFileName);

            //	Do some processing here

            $sheetData = $objPHPExcel->getActiveSheet()->toArray(null, true, true, true);
            var_dump($sheetData);
            echo '<br /><br />';
        }
        ?>
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